A fix is available
APAR status
Closed as program error.
Error description
Queue manager terminates due to CF link failure. When queue manager is restarted, 0C4-00000010 is generated as below: CSQ1,ABN=0C4-00000010,U=SYSOPR ,C=R3600.710.SSSC-CSQ3AUTH, M=CSQ 3AUFR,LOC=CSQ3AMGP.CSQ3AUCM+000005A6 Additional Symptom(s) Search Keyword(s): ABEND0C4 ABENDS0C4 0C4 S0C4 S00C4
Local fix
n/a
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 * * Release 0 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: ABEND0C4 in CSQ3AUCM at Qmgr start. * **************************************************************** * RECOMMENDATION: * **************************************************************** A Qmgr has stopped with some outstanding indoubt UOWs. On startup it works through the Agent Control Blocks (AGNT) to clean them up if they are no longer required. There is a timing window where CSQ3RISO has called CSQ3AUCM to free a CCB associated with an AGNT. Concurrently an IDENTIFY is being processed for another address space which had indoubt UOWs. CSQ3ID30 is the module handling the IDENTIFY and sets AGNTID30 to indicate it is has control, but resets AGNTID30 before it calls CSQ3ID50 to allocate an AGNT. CSQ3ID50 has set the CCB address in the AGNT, but not yet set AGNTEB which would indicate the EB for the address space. Since AGNTEB is zero, and AGNTID30 is off, this indicates the CCB can be freed. During the freeing of the CCB CSQ3AUCM references an AIDL control block in the wrong address space leading to the ABEND0C4.
Problem conclusion
CSQ3ID30 has been altered to set AGNTID30 off only on return from CSQ3ID50. 000Y CSQ3ID30
Temporary fix
Comments
APAR Information
APAR number
PI27389
Reported component name
WMQ Z/OS 8
Reported component ID
5655W9700
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2014-10-10
Closed date
2015-04-30
Last modified date
2015-07-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI26600
Modules/Macros
CSQ3ID30
Fix information
Fixed component name
WMQ Z/OS 8
Fixed component ID
5655W9700
Applicable component levels
R000 PSY UI26600
UP15/06/03 P F506
Fix is available
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Document Information
Modified date:
30 April 2020